Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
phong thanh » phan thanh, dong thanh, cong thanh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tang » hanh trang, hanh mang, hanh tung
ho chieu » theo chieu, hoc thieu, doi chieu
anh tang » anh bang, anh dang, anh nang
va bang » va nang, va lang, va ban
san cau » van cau, ban cau, can cau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((hanh tang) OR (anh tang)) va bang ((phuong thao) OR (phong thanh)) san cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - ((hanh tang) OR (anh tang)) va bang ((phuong thao) or (phong thanh)) san cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((hanh tang) OR (anh tang)) va bang ((phuong thao) or (phong thanh)) san cau*.